Add code to accept command line arguments
Accepts command line arguments for dbus object path,
dbus service name and an optional systemd unit file
to be called into when the timer expires.
Change-Id: I3fbe59b36d73ed9f28de2596d77e6d2e99371622
Signed-off-by: Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com>
diff --git a/argument.cpp b/argument.cpp
new file mode 100644
index 0000000..61b1f65
--- /dev/null
+++ b/argument.cpp
@@ -0,0 +1,93 @@
+/**
+ * Copyright © 2016 IBM Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <iostream>
+#include <cassert>
+#include "argument.hpp"
+
+namespace phosphor
+{
+namespace watchdog
+{
+
+using namespace std::string_literals;
+
+const std::string ArgumentParser::trueString = "true"s;
+const std::string ArgumentParser::emptyString = ""s;
+
+const char* ArgumentParser::optionStr = "p:s:t:?h";
+const option ArgumentParser::options[] =
+{
+ { "path", required_argument, nullptr, 'o' },
+ { "service", required_argument, nullptr, 's' },
+ { "target", required_argument, nullptr, 't' },
+ { "help", no_argument, nullptr, 'h' },
+ { 0, 0, 0, 0},
+};
+
+ArgumentParser::ArgumentParser(int argc, char** argv)
+{
+ int option = 0;
+ while (-1 != (option = getopt_long(argc, argv, optionStr, options, nullptr)))
+ {
+ if ((option == '?') || (option == 'h'))
+ {
+ usage(argv);
+ exit(-1);
+ }
+
+ auto i = &options[0];
+ while ((i->val != option) && (i->val != 0))
+ {
+ ++i;
+ }
+
+ if (i->val)
+ {
+ arguments[i->name] = (i->has_arg ? optarg : trueString);
+ }
+ }
+}
+
+const std::string& ArgumentParser::operator[](const std::string& opt)
+{
+ auto i = arguments.find(opt);
+ if (i == arguments.end())
+ {
+ return emptyString;
+ }
+ else
+ {
+ return i->second;
+ }
+}
+
+void ArgumentParser::usage(char** argv)
+{
+ std::cerr << "Usage: " << argv[0] << " options\n";
+ std::cerr << "Options:\n";
+ std::cerr << " --help Print this menu\n";
+ std::cerr << " --path=<Dbus Object path> Dbus Object path."
+ " Ex: /xyz/openbmc_project/"
+ "state/watchdog/host0\n";
+ std::cerr << " --service=<Dbus Service name> Dbus Service name."
+ " Ex: xyz.openbmc_project."
+ "State.Watchdog.Host\n";
+ std::cerr << " [--target=<systemd unit>] Systemd unit to be called on"
+ " timeout\n";
+}
+} // namespace watchdog
+} // namespace phosphor